The BACnet Standard—Standard 135-2012
A large collection of new technologies for emerging applications is contained in ASHRAE’s newly published BACnet standard.
ANSI/ASHRAE Standard 135-2012, BACnet – A Data Communication Protocol for Building Automation and Control Networks, allows building equipment and systems manufactured by different companies to work together. It is the only open, consensus-developed standard in the building controls industry. The new standard contains 19 addenda approved since the 2008 standard was published.
The standard contains several new ways to communicate: wireless communications is provided for applications where wired networks are impractical or expensive; a new XML vocabulary is provided for complex standard and proprietary data and metadata; a new character encoding method is provided for greater flexibility and compatibility with international text; and new state-of-the-art network security is defined to allow the creation of highly secure communications channels for sensitive data.
It also adds:
- higher speeds for MS/TP networks and wiring guidance for optically isolated segments
- new requirements for workstations and the definition of new kinds of workstations
- new engineering units to support smart grid and other emerging applications
- a new Global Group object for gathering, monitoring and distributing sets of data
- six new objects to support physical access control
- 12 new objects to support the full complement of all data types, including strings
$170 (ASHRAE Member $140) / 2012 / 1052 pages